Production and control requirements of different types of Neps
Production and control requirements of different types of Neps
In addition to the cotton quality and blended cotton quality, the processes that can reduce the neps in the cotton yarn quality of knitted fabrics are generally only the carding process and combing process. Of course, the winding process also has a certain removal effect on the large neps brought by the previous process. However, controlling the quality of the sliver in the carding process and combing process is the key factor to reduce the neps in the knitted fabric The quality requirements of sliver combed sliver are different.
The production and control requirements of different types of neps are analyzed
① Dead neps are caused by too much immature fiber content, poor maturity, too many seed chips with fiber, too many neps, and too high short fiber content in cotton. This requires that the textile factory must strictly follow the quality requirements of knitted cotton yarn and the blended cotton standard for high-grade knitted fabric cotton yarn.
② The harm of flying neps to knitted fabrics is also very serious. The most serious reasons for flying neps are that the production management is not in place, the cleaning and cleaning work is poor, and the cleaning and cleaning is not in place. In addition, the maintenance cycle of the equipment is too long, the interior of the equipment is too dirty, the refueling part of the equipment is too much, and the channel cleaning and smoothness of the equipment are poor raw.
③ Hairy neps are also an important factor affecting the quality of knitted fabrics. Hairy neps are mainly caused by excessive short fiber ratio in sliver and cotton yarn. To reduce hairiness neps, it is necessary to reduce the short fiber ratio of carding sliver and combed sliver; to further keep the spinning channel clean and smooth; to keep the speed of spinning frame and winding machine in a reasonable range Ensure the smoothness of spinning process components and give them a reasonable service life.
④ Cotton ball in knitted fabric is mainly caused by the friction with cotton yarn flying and hairiness. Therefore, it is very effective to strengthen the cleaning work during spinning and knitting process to reduce the cotton ball of knitted fabric. Keeping the smoothness of spinning, weaving equipment and channel can also further reduce the cotton ball of knitted fabric.
⑤ The color spots on the surface of knitted fabric is a manifestation of more neps in the cotton yarn of knitted fabric, which is generally caused by the excessive neps in cotton and blended cotton, as well as a large number of neps produced by rubbing and rubbing in the process of winding and knitting machine processing; in addition, a large number of cotton seed chips with fiber are not found in the spinning process It is caused by clearing and remaining in cotton yarn.